Note: It is important to determine the cause of the stain before beginning treatment to ensure that the proper product is applied. When you suspect staining, use ProGuard® Stain & Scale Inhibitor to prevent the metals from causing stains. Water filtration can also help to remove soluble metals in the water.
SOLUTION: "Permanent" stains (ones not easily brushed off) are typically the result of some chemical imbalance or metals present in the water. However, the idea is to prevent stains from occurring by using ProGuard® Stain & Scale Inhibitor on a monthly basis. ProGuard® Stain & Scale Inhibitor can also be used to lift fresh metal stains from copper, iron or manganese.
SOLUTION: This is a calcium or silicate scale build-up. Although scale is white, dirt is trapped in the crystals as they form. Brush affected areas and use ProGuard® Stain & Scale Inhibitor according to label directions.